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review.evervolv.com / android_kernel_oneplus_msm8996 / 187f1882b5b0748b3c4c22274663fdb372ac0452 / . / include / linux / pid_namespace.h
blob: f5bd679be46b50a93903b768754b7a363507c767 [file] [log] [blame]
Sukadev Bhattiprolu61a58c62006-12-08 02:37:58 -0800[diff] [blame]1#ifndef _LINUX_PID_NS_H
2#define _LINUX_PID_NS_H
Sukadev Bhattiproluaa5a6662006-10-02 02:17:23 -0700[diff] [blame]3
4#include <linux/sched.h>
Paul Gortmaker187f1882011-11-23 20:12:59 -0500[diff] [blame^]5#include <linux/bug.h>
Sukadev Bhattiproluaa5a6662006-10-02 02:17:23 -0700[diff] [blame]6#include <linux/mm.h>
7#include <linux/threads.h>
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]8#include <linux/nsproxy.h>
9#include <linux/kref.h>
Sukadev Bhattiproluaa5a6662006-10-02 02:17:23 -0700[diff] [blame]10
11struct pidmap {
12 atomic_t nr_free;
13 void *page;
14};
15
16#define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
17
Pavel Emelyanov20fad132008-07-25 01:48:43 -0700[diff] [blame]18struct bsd_acct_struct;
19
Sukadev Bhattiprolu61a58c62006-12-08 02:37:58 -0800[diff] [blame]20struct pid_namespace {
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]21 struct kref kref;
22 struct pidmap pidmap[PIDMAP_ENTRIES];
23 int last_pid;
Sukadev Bhattiprolu84d73782006-12-08 02:38:01 -0800[diff] [blame]24 struct task_struct *child_reaper;
Pavel Emelianovbaf8f0f2007-10-18 23:39:48 -0700[diff] [blame]25 struct kmem_cache *pid_cachep;
Pavel Emelyanovcaafa432008-04-30 00:54:31 -0700[diff] [blame]26 unsigned int level;
Pavel Emelyanovfaacbfd2007-10-18 23:40:04 -0700[diff] [blame]27 struct pid_namespace *parent;
Pavel Emelyanov07543f52007-10-18 23:40:08 -0700[diff] [blame]28#ifdef CONFIG_PROC_FS
29 struct vfsmount *proc_mnt;
30#endif
Pavel Emelyanov20fad132008-07-25 01:48:43 -0700[diff] [blame]31#ifdef CONFIG_BSD_PROCESS_ACCT
32 struct bsd_acct_struct *bacct;
33#endif
Vasiliy Kulikov04996802012-01-10 15:11:31 -0800[diff] [blame]34 gid_t pid_gid;
35 int hide_pid;
Sukadev Bhattiprolu3fbc9642006-10-02 02:17:24 -0700[diff] [blame]36};
37
Sukadev Bhattiprolu61a58c62006-12-08 02:37:58 -0800[diff] [blame]38extern struct pid_namespace init_pid_ns;
Sukadev Bhattiprolu3fbc9642006-10-02 02:17:24 -0700[diff] [blame]39
Eric W. Biederman57d5f662007-11-14 17:00:13 -0800[diff] [blame]40#ifdef CONFIG_PID_NS
Pavel Emelianova05f7b12007-10-18 23:39:47 -0700[diff] [blame]41static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]42{
Pavel Emelyanovb461cc02007-10-18 23:40:09 -0700[diff] [blame]43 if (ns != &init_pid_ns)
44 kref_get(&ns->kref);
Pavel Emelianova05f7b12007-10-18 23:39:47 -0700[diff] [blame]45 return ns;
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]46}
47
Eric W. Biederman213dd262007-07-15 23:41:15 -0700[diff] [blame]48extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns);
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]49extern void free_pid_ns(struct kref *kref);
Pavel Emelyanov74bd59b2008-02-08 04:18:24 -0800[diff] [blame]50extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]51
52static inline void put_pid_ns(struct pid_namespace *ns)
53{
Pavel Emelyanovb461cc02007-10-18 23:40:09 -0700[diff] [blame]54 if (ns != &init_pid_ns)
55 kref_put(&ns->kref, free_pid_ns);
Cedric Le Goater9a575a92006-12-08 02:37:59 -0800[diff] [blame]56}
57
Eric W. Biederman57d5f662007-11-14 17:00:13 -0800[diff] [blame]58#else /* !CONFIG_PID_NS */
59#include <linux/err.h>
60
61static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
62{
63 return ns;
64}
65
66static inline struct pid_namespace *
67copy_pid_ns(unsigned long flags, struct pid_namespace *ns)
68{
69 if (flags & CLONE_NEWPID)
70 ns = ERR_PTR(-EINVAL);
71 return ns;
72}
73
74static inline void put_pid_ns(struct pid_namespace *ns)
75{
76}
77
Pavel Emelyanov74bd59b2008-02-08 04:18:24 -0800[diff] [blame]78
79static inline void zap_pid_ns_processes(struct pid_namespace *ns)
80{
81 BUG();
82}
Eric W. Biederman57d5f662007-11-14 17:00:13 -0800[diff] [blame]83#endif /* CONFIG_PID_NS */
84
Eric W. Biederman61bce0f2009-01-07 18:08:49 -0800[diff] [blame]85extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
Adrian Bunk3ae4eed2008-07-25 01:48:34 -0700[diff] [blame]86void pidhash_init(void);
87void pidmap_init(void);
88
Sukadev Bhattiprolu61a58c62006-12-08 02:37:58 -0800[diff] [blame]89#endif /* _LINUX_PID_NS_H */